C#: Create a new string of length 2, using first two characters of a given string

Last update on December 20 2024 12:47:57 (UTC/GMT +8 hours)

First Two Characters with Missing '#' if Short

Write a C# Sharp program to create a new string of length 2, using the first two characters of a given string. If the given string length is less than 2 use '#' as missing characters.

Visual Presentation:

Sample Solution:-

C# Sharp Code:

using System; // Importing the System namespace

namespace exercises // Defining a namespace called 'exercises'
{
    class Program // Defining a class named 'Program'
    {
        static void Main(string[] args) // The entry point of the program
        {
            // Output the results of the test function with different strings as arguments
            Console.WriteLine(test("Hello")); // Pass "Hello" as an argument to the test function
            Console.WriteLine(test("Python")); // Pass "Python" as an argument to the test function
            Console.WriteLine(test("a")); // Pass "a" as an argument to the test function
            Console.WriteLine(test("")); // Pass an empty string as an argument to the test function
            Console.ReadLine(); // Wait for user input before closing the console window
        }

        // Function definition of the test function that takes a string 's1' and returns a string
        public static string test(string s1)
        {
            if (s1.Length >= 2) // Check if the length of 's1' is greater than or equal to 2
            {
                s1 = s1.Substring(0, 2); // If so, take the substring of 's1' starting from index 0 with a length of 2
            }
            else if (s1.Length > 0) // Check if 's1' length is greater than 0 but less than 2
            {
                s1 = s1.Substring(0, 1) + "#"; // If so, take the first character of 's1' and concatenate "#" to it
            }
            else // If 's1' is an empty string
            {
                s1 = "##"; // Assign 's1' as "##"
            }

            return s1; // Return the modified or original 's1'
        }
    }
}

Sample Output:

He
Py
a#
##

Flowchart:

C# Sharp Code Editor:

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